# -*- coding:utf-8 -*-
import numpy as np

a = np.arange(4)
b,c = a,a
d = b
a[0] = 11
print(a)
print(b)
print(c)
print(d is a) 
d[1:3] = [22,33] 
print(a)
b = a.copy() # deep copy
print(b)
b[0] = 44
print(b,a)
